The Secretary of Health and Human Services (referred to in this section as the “Secretary”), acting through the Commissioner of Food and Drugs and in consultation with the U.S. Customs and Border Protection, shall develop and periodically update a mutually agreed upon list of the controlled substances that the Secretary will refer to U.S. Customs and Border Protection, unless the Secretary and U.S. Customs and Border Protection agree otherwise, when such substances are offered for import via international mail and appear to violate the Controlled Substances Act (21 U.S.C. 801 et seq.), the Controlled Substances Import and Export Act (21 U.S.C. 951 et seq.), the Federal Food, Drug, and Cosmetic Act (21 U.S.C. 301 et seq.), or any other applicable law. The Secretary shall transfer controlled substances on such list to the U.S. Customs and Border Protection. If the Secretary identifies additional packages that appear to be the same as such package containing a controlled substance, such additional packages may also be transferred to U.S. Customs and Border Protection. The U.S. Customs and Border Protection shall receive such packages consistent with the requirements of the Controlled Substances Act (21 U.S.C. 801 et seq.).